Micro Power Circuits
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Although ceramic resonators are a good choice for low-power, low-frequency clock sources (if you can stand their 30-ppm te.. -
The detector uses three sections of an L144 and a DC4011 type CMOS NAND gate to make a very low power voltage monitor. If the input voltage, Vin, is above Vhigh or below Vlow, the output will be a logical high. If (and only if) the input is between the.... -
The current tracer helps locate a defective IC that is loading down the power supply. The tracer amplifies the small voltage drop caused by current flow along a fraction of an inch of PC wiring and drives an ordinary microammeter. Needle-point test probes.... -
The voltage reference circuit described below, is a special implementation of current source LM334. Characterized by a very small temperature coefficient metatholio output voltage and consumes only 10uA room temperature. This current fluctuates by a few uA,.... -
Shows a 32.768 kl-b: micro-power clock oscillator circuit, and can be used in mobile phones, laptop computers and home appliances production generates a clock signal supplements... -
Shown for the WS157 or WS106 with low power miniature switching power supply. WS157 or WS106 is newly developed in recent years a regulated switching power supply control device, the internal control circuitry and power switches integrated on the same chip,.. -
Compared to other operational amplifier, OP90 significant advantage in low power consumption. With its low power consumption, the power supply voltage adapted to a wide range (.. -
This implementation is adapted to rebroadcast the output of a CD player, television receiver, or radio receiver. I use it so that I can move about the house and listen to my favorite programs without disturbing others. Within and the house, I find that I can.... -
Industrial, automotive and telecom applications pose tough design challenges due to harsh operating environments and large voltage transients on already high (12V to 48V) rails. Some switching power supplies are robust enough to provide localized low.... -
The design of battery-powered equipment can often be quite challenging. Since few ICs can operate directly from the end-of-life voltage from a 2-cell battery (about 1.8V), most systems require a DC/DC converter. The system designer often has a limited....
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Conventional monolithic micropower op amps with a wide supply voltage range require a large die area and therefore, a large package and footprint. The unconventional LT®6011 dual op amp fits 25mV input precision micropower operation and wide 2.7V to 36V....
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The LT®6700 dual comparator incorporates features to reduce part count in space-critical designs, including a trimmed on-chip 400mV bandgap derived reference and internal hysteresis mechanisms. The LT6700 also features low voltage micropower single....
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Some applications require a circuit to indicate that a battery`s voltage has fallen below a certain value. However, if you don`t frequently check the indicator, the low-battery indicator itself can easily discharge the battery. The circuit in Figure 1....
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It is always desirable to use a low-battery indicator that consumes as little power as possible. For a 9V, 450-mAhr alkaline battery, a 50-µA low-battery indicator can by itself run the battery down in a little more than a year. Battery-powered devices that....
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The LT®1500/LT1501 current mode step-up regulators control both the maximum and minimum inductor current, resulting in continuous inductor current and nearly constant switching frequency and output ripple over a wide load current range. The switching....
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A `micro power solar engine` has been a goal since my introduction to BEAM Robotics. I believe that if there wasn`t one before, I there is one now. What I`m presenting to you looks very similar to one of the circuits found in Steven Bolt`s web pages..... -
The circuit in Figure 1 implements a low-cost, micropower, latching motor controller that uses current sensing rather than switches to stop the motor. The design is optimized for a supply voltage of 3 to 9V, making it well-suited to battery-powered....
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When a processor-controlled device must operate reliably, designers often choose to periodically reset the processor rather than rely on a watchdog configuration. In low-power systems, this periodic-reset circuit can consume a large part of the system`s....
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Voltage reference integrated circuits are widely used to establish accurate and stable voltages in analog circuits. While calibration-grade references are based on buried Zener diode technology (or even more exotic methods), the ubiquitous band-gap....
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Portable electronic devices operating from one or more alkaline or nickel-metal-hydride cells require a boosted supply that is both small and efficient. Linear Technologys new LTC®3401 and LTC3402 are high frequency micropower synchronous boost....
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The LT®1462/LT1464 duals and the LT1463/LT1465 quads are the first micropower op amps to offer picoampere input bias currents and unity-gain stability when driving capacitive loads. For each amplifier, the LT1462/LT1463 consume only 28mA of supply....
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Data acquisition applications that require low power dissipation fall into two general areas: products that must use power very efficiently, such as battery-powered portable test equipment, and remotely located data logging equipment. To help meet these....
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Linear Technology introduces a new micropower DC/DC converter designed to provide high output power from a single cell or higher input voltage. The LT®1308 features an onboard switch capable of handling 2A with a voltage drop of 300mV and operates from....
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Two combinations of cell count and output voltage are to be strictly avoided: three cells converted to 3.3V and four cells converted to 5V. These combinations are troublesome because no ordinary regulator (boost, buck or linear) can accommodate a....
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You can expect 100mA output from LT1303 based circuits and 300mA from the LT1372 circuit without modification. All of the circuits feature output disconnect; in shutdown the outputs fall to 0V...
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The LTC1155, dual micropower MOSFET driver, generates 12V from a 5V rail to fully enhance logic-level Nchannel switches with no external components required (see Figure 1). Further, the supply current is typically 85mA with the switch fully enhanced and....
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The LTC®1541 combines a micropower amplifier, comparator and 1.2V reference in an 8-pin package. The part operates from a single 2.5V to 12.6V supply with typical supply current of 5mA. Both op amp and comparator feature a common mode input voltage range....
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The only SOT-23 op amps featuring Over-The-TopTM operation the ability to operate with either or both inputs above the positive railare the 55mA LT®1782 and the 300mA LT1783. This feature is important in many currentsensing applications, where the inputs....
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Three new linear regulators simplify the design of batteryoperated equipment. The LT®1521 is a 300mA, positive low dropout regulator with micropower quiescent current and shutdown. The LT1175 is a 500mA negative complement with adjustable current limit.....
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The LTC®1440 series comparators are true micropower devices. They eliminate current peaking during switching, resulting in greatly reduced power consumption versus frequency, or when the inputs are nearly balanced. Figure 2s plot contrasts the LTC1440s....
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This audio amplifier circuit, connected to 32 Ohm impedance mini-earphones, can detect very remote sounds. Useful for theatre, cinema and lecture goers: every word will be clearly heard. You can also listen to your television set at a very low volume,.... -
A constant off-time control which provide a high efficiency over a wide range of output current can be used by the LT3463A dual micropower DC/DC converters with internal Schottky Diodes, as described in the following circuit diagram and the datasheet..
New Circuits
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This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is.... -
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to.... -
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This.... -
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the.... -
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,.... -
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the.... -
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power.... -
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
Popular Circuits
When SI is on, power is applied to an oscillator composed of Ql, Rl, Cl, LI, and L2. Coil Ll is...
As a sensor in the design of this linear thermometer, the LM34 is used. The output is the...
Normally mobile batteries have a lifespan of 2-5 years under normal usage. But then we have to...
This is the second part of the square root algorithm. It was developed in one month during the...